Toshiba GR200 Series Instruction Manual page 373

Out of step tripping by voltage (OSTV)
Certain power disturbance may cause the loss of synchronism between terminal ends. When
the loss occurs, the disturbance should be separated from the power system promptly. The
function of out-of-step-tripping by voltage (OSTV) can detect such fault; and the detection is
done by comparing the voltages at the terminals.
─────────────────────────────────────────────────────────────────
Note: Several IED models do not have out of step tripping features. To determine whether
the features are implemented in the IED or not, locate the IED ordering number; and check
the order number at "G&T position" referring to the comparison table below. For more
information, see
Table 2.27-1 Comparative table in respective ordering numbers
Out of step tripping by voltage
OSTV
✓: Applicable
Appendix: Ordering
.
feature
NA: Not applicable
- 350 -
6F2S1914 (0.49)
Ordering No. at "G&T"
33 37
✓
✓
GRL200 (Soft 033 & 037)